混凝去除垃圾渗滤液中DOM的实验研究  

Removal of DOM in Leachate by Coagulation

作　　者：位菁[1] 张彩香[1] 马腾[1] 

机构地区：[1]教育部生物地质与环境地质重点实验室,中国地质大学环境学院武汉430074

出　　处：《环境科学与技术》2007年第8期1-2,共2页Environmental Science & Technology

基　　金：国家自然科学基金(40402021);教育部科学技术研究项目联合资助(重点104038)

摘　　要：选取氯化铁(FeCl3.6H2O)为混凝剂,以经0.45μm膜和1nm膜分子切割的垃圾渗滤液为研究对象,通过混凝剂投加量和混凝pH值实验,研究了垃圾渗滤液中DOM的去除情况,并比较了两种不同分子量水平的渗滤液中DOM的混凝去除特点。研究表明,pH值是影响渗滤液DOM去除的主要因素,氯化铁在pH=5、投加量为4g/L的条件下混凝效果最佳。混凝pH值对大分子量渗滤液中DOC去除的影响较大;而两种分子量水平的渗滤液UV254的去除差异不大。The removal of dissolved organic matters (DOM) was studied with ferric chloride (FeCl3·6H2O) as a coagulant and leachate separated by membranes of 0.45FFUm and 1nm. Results showed that pH value was the main factor of coagulation and optimum coagulation conditions for removal of DOM appeared when dosage of FeCl3·6H2O was 4g/L and pH 5. The comparison of different molecular weight DOM indicated that the impact of pH to removal of DOC in the leachate with molecular weight less than lOOODa was much greater than that less than 0.45FFUm. The difference of UV254 removal between these two kinds of molecular weight was not very obvious.

关 键 词：垃圾渗滤液 混凝 溶解性有机物 分子量 

分 类 号：X703[环境科学与工程—环境工程]